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Hi there, Your code 164-11 is injection actuation pressure sensor fault. This will usually cause the engine to have low power and run rough. This code can be caused by several things. Faulty HEUI pump, injector o rings, faulty sensor, faulty injector or even possibly a bad ecm. The best thing that you can do is go to your dealer that has a cat et scanner this will help simplify the diagnostic procedure.
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